JPH0749937Y2 - Fever sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a heat generating sheet that generates heat in the presence of air.

[Prior Art and Problems to be Solved by the Present Invention] A heating element containing a heating agent composed of metal powder, water, a water retention agent, an oxidation promoter, etc. in a bag having a vent hole does not require ignition and is airless. It is well known that it is commercially available as a disposable body warmer because it generates heat simply by contacting with (oxygen).

Such a heating element is generally used for the purpose of keeping warmth of the waist, abdomen, hands, etc. of the human body, but recently, it has been required due to diversification of consumers' needs and sophistication of desire. The use of the fever principle extends to facial beauty and medical applications.

However, in order to apply the conventional heating element to such an application, the heating agent can be kept in the bag during use by simply improving the shape of the bag, the composition and filling amount of the heating agent, the exothermic temperature characteristics, etc. Since it moves or is biased, it has a disadvantage that the mountability to the body part is significantly deteriorated and an uncomfortable feeling is caused.

Therefore, as a heat generating element suitable for such an application, the heat generating element is light and thin and has a great flexibility. What is desired is to develop a tactile wearing comfort.

As a known heating element for such a request, (1) a plurality of sheet-like chemical heating elements in which a heating agent is packaged in a breathable packaging material are arranged between base material sheets, and the outer peripheral portion and the like are sewn on. (JP-A-56-85336), (2) A heat-generating agent embedded in a foaming space of an open-cell resin sheet, sandwiched between laminated sheets made of non-woven fabric or the like and heat-sealed (JP-A-56-85336), or There is a holding material having a large number of voids, which is filled with a heating agent and covered with an inner bag material (Actual No. 56-82450).

However, these heating elements have the following drawbacks.

Since the heating element of (1) is an assembly of heating elements packaged in a pouch, it cannot be said that the uncomfortable feeling on the face is eliminated. Further, in the heating element of (2), it is necessary to store the holder containing the heating agent in the breathable bag as it is or cover it with a breathable sheet, and the form of the heating sheet has a limitation in thinness. , The step between the central surface and the end seal surface impairs the aesthetic appearance of the sheet. Further, during use, the exothermic agent is gradually detached from the holding portion and biased as the vibration and the oxidation reaction progress, and the sheet-shaped prototype cannot be maintained.

The present invention overcomes the above-mentioned conventional drawbacks and applies it to the curved surface of the body to provide a warm and tactile wearing comfort. It is intended to provide a heat generating sheet having a light, thin and flexible structure.

[Means for Solving the Problems] In the present invention, an exothermic agent that generates heat in the presence of air is disposed between an adhesive sheet having an adhesive layer on the inner surface and a porous packaging material, and a peripheral edge of the exothermic agent. A heat-generating sheet characterized in that both packaging materials of a part are pressure-sensitively sealed using an adhesive of an adhesive sheet.

A preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of a heat-generating sheet for facial treatment according to the present invention, which is a face-shaped heat-generating sheet provided with eyes, a cutout 9 in the mouth, and a notch 10 in the nose along the face. is there.

FIG. 2 shows a cross-sectional view taken along the line AA of FIG. 1, in which the heat-generating agent 4 which generates heat in the presence of air is uniformly layered between the porous wrapping material 3 and the adhesive sheet 7 in conformity with the facial shape. The pressure-sensitive seal portion 8 is disposed at the peripheral portion, the cutout portion 9, the notch portion 10 and the entire peripheral portion of the heat generating sheet.

Such a heat-generating sheet usually has the surface of the porous packaging material 3 on the outside,
The adhesive sheet 7 is attached so that it closely contacts the face.

The two packaging materials sandwiching the exothermic agent 4 of the present invention are thin and highly flexible, and at least one of them is a porous packaging material 3 which is a breathable packaging material.

The porous wrapping material 3 is a wrapping material having an appropriate air permeability such that it becomes a sheet-shaped heating element, and by using it on the ventilation surface,
As a heat-generating sheet for facial treatment, it is highly flexible so that it fits along the curved surface of the face, there is no powder leakage of the heat-generating agent 4, and it is divided into compartments as a heat-generating agent storage section or a holding material is used. It is possible to prevent the exothermic agent 4 from moving or being biased without requiring structural or physical means. That is, it is possible to form a soft and thin facial heat generating sheet in which the heat generating agent 4 is sandwiched between two packaging materials.

As the porous wrapping material 3, porous sheets whose air permeability is adjusted, or laminated sheets of the porous sheets and other breathable sheets are applied, and specific examples of the porous sheets are shown. Examples include the product name NF sheet (made by Tokuyama Soda), the product name Servoa (made by Sekisui Chemical), and the product name Breslon (made by Nitto Denko).

A preferred specific example of the porous packaging material 3 is a laminated sheet in which the porous sheet 2 and the nonwoven fabric 1 are partially or entirely laminated, and it is preferable to use the nonwoven fabric 1 as the outer surface.

In order to facilitate the sealing with the porous packaging material 3, the adhesive sheet 7 having the adhesive layer on the inner surface is applied with the base material sheet 6 having the adhesive layer on at least the surface in contact with the porous packaging material 3. It The pressure-sensitive adhesive may be applied to the entire inner surface of the base sheet 6 or to a desired portion, but the one in which the base sheet 6 and the double-sided pressure-sensitive adhesive sheet 5 are bonded together is used.

A conventional adhesive is used as the adhesive, and is selected from, for example, rubber-based, acrylic-based or vinyl acetate-based adhesives.

As the base material sheet 6, single or composite sheets selected from non-woven fabrics, plastic films, porous sheets, sponge sheets, foamed sheets and the like are applied, but non-woven fabrics, plastic films or laminated layers thereof. Sheets are preferred. In particular, a polyester-based or polyolefin-based non-woven fabric which is thin and soft and has a smooth texture is preferable.

The double-sided pressure-sensitive adhesive sheet 5 is a sheet having the above-mentioned pressure-sensitive adhesive on both sides or inside of a base material such as non-woven fabric, paper, plastic film or plastic foam. Those obtained are preferable because the flexibility and stretchability are maintained.

The double-sided pressure-sensitive adhesive sheet 5 has a release paper or a release film (hereinafter referred to as a release material) or the like attached on one side thereof, and the other side of the base sheet 6
And the release material is peeled off when the heat generating sheet is manufactured. If the pressure-sensitive adhesive of the double-sided pressure-sensitive adhesive sheet has a pressure-sensitive sealing property, it is possible to easily seal the periphery of the heat-generating agent, that is, the porous packaging material 3 at the pressure-sensitive sealing portion 8 by only pressing.

As a sealing method, a pressure sensitive seal can be applied.

The exothermic agent 4 may be a composition that generates heat in the presence of air, and for example, (a) metal powder such as iron powder, (b) water, (c).
A composition containing, as a main component, an oxidation aid such as a metal halide salt or a sulfate salt and (d) a water retention agent such as wood powder, leucite, activated carbon or a water-absorbing polymer is applied, and further, an inorganic material as a hydrogen generation inhibitor. It may be a composition to which salts, a binder as a compounding aid, a surfactant as an impregnation aid, and the like are added. Preferably, a composition comprising at least iron powder, water, a metal halide salt and activated carbon is used.

It is important that the heat generating sheet of the present invention has a thin and flexible structure so that it can be applied to the curved surface of the body, and therefore it is usually desired that a small amount of heat generating agent satisfy the required performance. However, the smaller the amount of the exothermic agent used, the greater the degree of deterioration of the exothermic agent due to contact with air during the manufacturing process. To avoid such an inconvenience, the exothermic agent 4 has the above exothermic composition. Rather than using the product as is, an oxidation aid with most or all of the water from the composition,
After arranging the composition excluding at least one component selected from the group consisting of inorganic salts and surfactants or a dried product thereof at a desired position on any packaging material, water or an oxidation aid, A method of forming the exothermic agent 4 by adding an aqueous solution of at least one component selected from the group consisting of inorganic salts and surfactants is preferred. By doing so, deterioration of the heat generating agent due to contact with air can be reduced as much as possible.

The heat generating agent 4 is preferably arranged in a thin layer according to the facial shape, but may be scattered in a plurality of circular shapes or the like.

The method of arranging the exothermic agent 4 in a desired shape on the packaging material surface is as follows.
When a plate having a punched portion corresponding to the arrangement position is used by stacking it on the packaging material, a method using an electromagnet plate or a permanent magnet plate provided corresponding to the arrangement position, or a method combining these methods, etc. It's easy.

If you make holes on the left and right ends of the face-shaped heat generating sheet, attach a fixing tool such as a string or elastic band, or if you have a structure that has a notch on the left or right of your temple or chin, the heat generating sheet will be on the face. Can be fitted even more.

FIG. 3 is a cross-sectional view of another flexible thin heating sheet of the present invention, which has a rectangular shape and the adhesive sheet 7 is made of polyethylene film 12 / polyester non-woven fabric 13
The structure is the same as that of FIG. 2 except that the pressure-sensitive adhesive layer 11 is provided on the inner surface of the base sheet 6 made of. Because it is thin and flexible, it can be applied to curved parts of the body.

As described above, the heat generating sheet of the present invention has a rectangular shape by changing its shape, the air permeability of the porous packaging material 3, the amount of the heat generating agent 4 or the composition ratio thereof is slightly adjusted, or the outer surface of the base sheet 6 is adjusted. By applying a pressure-sensitive adhesive layer or a far-infrared ray-generating substance to the sheet, it can be applied to conventional uses and medical purposes as a heat generating sheet that can be used even on a curved surface of the body. Alternatively, it is possible to apply a poultice or a medicinal component to the outer surface of the base material sheet 6 or to form a warm poultice body by adhering to form an integrated structure.

Next, the present invention will be described more specifically with reference to Examples.
The present invention is not limited to these.

[Example-1] In Fig. 2, the adhesive sheet 7 is a polyester non-woven fabric 6 having a thickness of 0.4 mm and a double-sided adhesive sheet 5 having a thickness of 0.1 mm (a double tack tape # manufactured by Sekisui Chemical Co., Ltd. 575
(Acrylic pressure-sensitive adhesive)).

The porous wrapping material 3 is made by bonding a nylon spunbonded nonwoven fabric 1 and a polyethylene porous sheet 2 to each other to have an air permeability of 8000.
sec / 100ml (High pressure type Gurley method (Kumagaya Riki measuring instrument)
The laminated sheet adjusted to

Each sheet has a short diameter of 20 cm and a long diameter of 24 according to the facial shape.
An oval shape with a size of cm was cut out, and the eyes, nose, and mouth were cut out.

The release material of the face-shaped adhesive sheet 7 was peeled off, and 15 g of a mixture consisting of 30 parts of iron powder, 1 part of salt and 5 parts of activated carbon was uniformly arranged in layers on the adhesive surface excluding the pressure-sensitive sealing part 8. , 1
The exothermic agent 4 was formed by uniformly impregnating 3 g of 0% saline.

Next, the porous packaging material 3 is overlaid with the two layers of the polyethylene porous sheet inside, and pressure-sensitively sealed at the pressure-sensitive sealing portion 8 of the adhesive sheet 7 to form a heat-generating sheet for facial treatment, and a gas barrier. The film was sealed with a permeable film.

The heat generation performance of such a heat generating sheet for facial treatment is JIS S4100-1.
When measured with a standard measuring device specified in 985, the rise time was 2 minutes, the maximum temperature was 48 ° C, and the duration was 2 hours.

In addition, when a wearing test was attempted when the face pack was used, it was flexible and had a warm and comfortable wearing feeling.

[Example-2] In FIG. 3, the adhesive sheet 7 is a polyethylene film.
12 / Polyester non-woven fabric 13 Adhesive layer 11 having a release material on the polyethylene film 12 side of the base sheet 6
(Acrylic adhesive was used as the adhesive).

The porous wrapping material 3 is made of a nylon spunbonded nonwoven fabric 1 and a polyethylene porous sheet 2 which are bonded together to have an air permeability of 4500.
A laminated sheet adjusted to sec / 100 ml was used.

Each sheet was prepared by cutting it into a rectangle with a short side of 10 cm and a long side of 14 cm.

The release material of the adhesive sheet 7 was peeled off, and 11 g of the mixture consisting of 30 parts of iron powder, 1 part of salt and 5 parts of activated carbon was uniformly arranged on the adhesive surface excluding the pressure sensitive sealing part 8 having a width of 5 mm at the peripheral edge. Then 1
The exothermic agent 4 was formed by uniformly impregnating 3 g of 0% saline.

Next, the porous wrapping material 3 is overlaid with the two layers of the polyethylene porous sheet inside, and pressure-sensitively sealed at the pressure-sensitive sealing portion 8 of the adhesive sheet 7 to form a flexible thin heat generating sheet. It was sealed in a barrier film.

The heat generation performance of such a heat generating sheet was measured by a standard measuring device specified in JIS S4100-1985, and the rising time was 5
The maximum temperature was 55 ° C and the duration was 5 hours.

In addition, when I tried a wearing test by sandwiching it between the lower abdomen underwear, it was thin, warm and comfortable without feeling any discomfort.

[Advantage of the Invention] According to the present invention, the structure is lighter, thinner and more flexible than the conventional one, and fits along the curved surface of the body.
The thermal and tactile comfort was significantly improved.

[Brief description of drawings]

FIG. 1 is a plan view of a heat-generating sheet for facial treatment of the present invention,
FIG. 2 is a sectional view taken along the line AA of FIG. FIG. 3 shows a cross-sectional view of another flexible thin heating sheet of the present invention. The symbols in the figure are as follows: 1 ... Nonwoven fabric 2 ... Porous sheet 3 ... Porous packaging material 4 ... Exothermic agent 5 ... Double-sided adhesive sheet 6 ... Base material sheet 7 ... Adhesive sheet 8 ... … Pressure sensitive seal part 9 …… Cutout part 10 …… Cut part 11 …… Adhesive layer 12 …… Polyethylene film 13 …… Polyester non-woven fabric

Claims (3)

[Scope of utility model registration request] 1. An exothermic agent that generates heat in the presence of air is disposed between an adhesive sheet having an adhesive layer on its inner surface and a porous encapsulant, and both encapsulants on the periphery of the exothermic agent are adhesive. A heat-generating sheet characterized by being pressure-sensitively sealed using a sheet adhesive. 2. The heat generating sheet according to claim 1, wherein the adhesive sheet is a composite sheet obtained by laminating a non-woven fabric, a plastic film or a laminated sheet of these with a double-sided adhesive sheet. 3. The heat-generating sheet according to claim 1, wherein the porous packaging material and the adhesive sheet are face-shaped and the eyes, mouth and nose are cut out and / or cut to make a face. .